Yb_(3)Cu_(9)(OH)_(19)Cl_(8)单晶的生长和低温磁性研究  

Single Crystal Growth and Low Temperature Magnetic Properties of Yb_(3)Cu_(9)(OH)_(19)Cl_(8)

作　　者：余振伟 梁慧 王义炎 孙学峰 李秋菊[3] YU Zhenwei;LIANG Hui;WANG Yiyan;SUN Xuefeng;LI Qiuju(Schoolof Materials Science and Engineering,Anhui University,Hefei 230601,P.R.China;Instituteof Physical Science and Information Technology,Anhui University,Hefei 230601,P.R.China;Schoolof Physics and Optoelectronic engineering,Anhui University,Hefei 230601,P.R.China)

机构地区：[1]安徽大学材料科学与工程学院,合肥230601 [2]安徽大学物质科学与信息技术研究院,合肥230601 [3]安徽大学物理与光电工程学院,合肥230601

出　　处：《低温物理学报》2023年第6期304-310,共7页Low Temperature Physical Letters

基　　金：安徽省自然科学基金(批准号:2108085MA16,2108085QA22);安徽省教育厅重点项目(批准号:KJ2020A0013);国家自然科学基金(批准号:12274388,12104010,52102333,12104011)资助的项目。

摘　　要：本文介绍了新型kagomé晶格化合物Yb_(3)Cu_(9)(OH)_(19)Cl_(8)单晶的生长及磁性质研究.利用水热法制备了高品质的Yb_(3)Cu_(9)(OH)_(19)Cl_(8)单晶,X射线衍射的精修结果表明,Cu^(2+)离子在ab面内形成kagomé结构,Yb^(3+)离子处在kagomé六角晶格的中心.磁化率结果表明Yb_(3)Cu_(9)(OH)_(19)Cl_(8)在温度低至2 K仍没有磁有序转变,表现出明显的顺磁行为.居里-外斯拟合结果显示,磁性离子间具有强的反铁磁耦合相互作用.温度低至2 K的比热曲线上没有明显的磁相变行为的出现,而是表现出典型的肖特基特征.The single crystal growth and magnetic properties of a new kagomélattice compound Yb_(3)Cu_(9)(OH)_(19)Cl_(8) are reported.High quality Yb_(3)Cu_(9)(OH)_(19)Cl_(8) single crystals were prepared by hydrothermal method.The refinements of powder X-ray diffraction show that Yb_(3)Cu_(9)(OH)_(19)Cl_(8) forms a kagomé-Cu^(2+) structure within the ab plane,with Yb^(3+) ions in the center of hexagonal lattice of the kagomélayer.The temperature dependence of magnetic susceptibility shows obvious paramagnetic behavior without magnetic transition with lowering temperature down to 2 K.The Curie-Weiss fitting indicates Yb_(3)Cu_(9)(OH)_(19)Cl_(8) has strong antiferromagnetic coupling interactions.Low-temperature specific heat does not show any magneticphasetransitiondownto2 K,with typical Schottky anomaly at low temperatures.

关 键 词：水热法 自旋液体 磁化率 比热 

分 类 号：O469[理学—凝聚态物理]